Jayrude
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voxel-rs
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Only upload modified parts of brickmap buffers

This commit is contained in:
Jarrod Doyle 2023-05-03 15:10:18 +01:00
parent af0ab3bb66
commit 66dfffd78b
Signed by: Jayrude
GPG Key ID: 38B57B16E7C0ADF7
1 changed files with 37 additions and 30 deletions
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67
src/voxel/brickmap.rs
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@ -1,5 +1,3 @@
use std::future;
use wgpu::util::DeviceExt;
use crate::render;
@ -102,29 +100,6 @@ impl BrickmapManager {
}
}
// TODO: Ideally this should take a generic voxel format and do the data mapping here
pub fn set_data(&mut self, chunk_pos: glam::UVec3, data: &[u32; 16], colours: &[u32]) {
let idx: usize = (chunk_pos.x + chunk_pos.y * 32 + chunk_pos.z * 1024)
.try_into()
.unwrap();
let shading_idx = idx * 512;
self.brickgrid
.splice(idx..idx + 1, [((idx as u32) << 8) + 4]);
self.brickmap_cache[idx].bitmask = *data;
self.brickmap_cache[idx].shading_table_offset = shading_idx as u32;
self.shading_table.splice(
shading_idx..(shading_idx + colours.len()),
colours.to_owned(),
);
}
pub fn set_empty(&mut self, chunk_pos: glam::UVec3) {
let idx: usize = (chunk_pos.x + chunk_pos.y * 32 + chunk_pos.z * 1024)
.try_into()
.unwrap();
self.brickgrid.splice(idx..idx + 1, [0]);
}
pub fn update_buffer(&self, context: &render::Context) {
let queue = &context.queue;
queue.write_buffer(
@ -197,11 +172,11 @@ impl BrickmapManager {
let chunk_y = data[i * 4 + 1];
let chunk_z = data[i * 4 + 2];
let chunk_pos = glam::uvec3(chunk_x, chunk_y, chunk_z);
let chunk_idx = chunk_x + chunk_y * 32 + chunk_z * 1024;
let chunk_idx = (chunk_x + chunk_y * 32 + chunk_z * 1024) as usize;
if chunk_idx % 3 == 0 || chunk_idx % 5 == 0 || chunk_idx % 7 == 0 {
self.set_empty(chunk_pos);
self.update_brickgrid_element(context, chunk_idx, 0)
} else {
// Build the voxel data
let mut bitmask_data = [0xFFFFFFFF as u32; 16];
let mut albedo_data = Vec::<u32>::new();
for z in 0..8 {
@ -225,13 +200,45 @@ impl BrickmapManager {
bitmask_data[2 * z as usize + 1] =
((entry >> 32) & 0xFFFFFFFF).try_into().unwrap();
}
self.set_data(chunk_pos, &bitmask_data, &albedo_data);
// Update the brickgrid index
let brickgrid_element = ((chunk_idx as u32) << 8) + 4;
self.update_brickgrid_element(context, chunk_idx, brickgrid_element);
// Update the shading table
let shading_idx = chunk_idx * 512;
self.shading_table.splice(
shading_idx..(shading_idx + albedo_data.len()),
albedo_data.clone(),
);
context.queue.write_buffer(
&self.shading_table_buffer,
(shading_idx * 4) as u64,
bytemuck::cast_slice(&albedo_data),
);
// Update the brickmap
self.brickmap_cache[chunk_idx].bitmask = bitmask_data;
self.brickmap_cache[chunk_idx].shading_table_offset = shading_idx as u32;
context.queue.write_buffer(
&self.brickmap_buffer,
(72 * chunk_idx) as u64,
bytemuck::cast_slice(&[self.brickmap_cache[chunk_idx]]),
);
}
}
// Reset the request count on the gpu buffer
let data = &[0, 0, 0, 0];
context.queue.write_buffer(&self.feedback_buffer, 4, data);
self.update_buffer(context);
}
fn update_brickgrid_element(&mut self, context: &render::Context, index: usize, data: u32) {
self.brickgrid.splice(index..index + 1, [data]);
context.queue.write_buffer(
&self.brickgrid_buffer,
(index * 4).try_into().unwrap(),
bytemuck::cast_slice(&[self.brickgrid[index]]),
);
}
}